View clinical trials related to Cataract.
Filter by:A refractive surprise can be defined as the failure to achieve the intended postoperative refractive target or the presentation of unexpected and, unwanted post-operative refractive error. It can cause anisometropia or dominance switch and is a source of patient dissatisfaction due to unmet expectations.The best way to manage refractive surprise is to prevent it. The 2017 NICE guidelines on the management of cataracts provide advice on prevention of refractive surprise through accurate biometry, A-constant optimisation, intraocular lens (IOL) formula selection and avoiding wrong lens implant errors.Benchmark standards for NHS cataract surgery dictate that 85% of eyes should be within 1 dioptre (D) and 55% within 0.5D of target spherical equivalent refraction following surgery.
Prospective, multicenter, bilateral, interventional, controlled, masked (sponsor, subjects, and evaluators), randomized clinical trial.
Cataract surgery represents a common surgical intervention, encompassing the extraction of the opaque natural crystalline lens, followed by the substitution with an artificial intraocular lens (IOL). To ascertain an IOL possessing optimal power, antecedent to the surgery, preoperative evaluations are conducted through the utilization of a biometric devices. Diverse categories of these instruments are accessible, each harnessing distinct optical methodologies or mathematical algorithms to ascertain the most fitting IOL power. The principal objective of this study was to evaluate the ocular biometry and the predictive precision outcome of a biometer that uses standard keratometry to the prediction accuracy of another biometer that uses Total Keratometry.
The study objectives were: - To evaluate the efficacy of EDTA 1.3% and 2.6% ophthalmic solution (C-KAD) in improving visual function as assessed by contrast sensitivity; - To evaluate the safety and tolerability of two doses of EDTA ophthalmic solution (C-KAD); and - To determine the optimal clinical dose of EDTA ophthalmic solution (C-KAD) which to proceed into pivotal study(s).
The goal of this observational study is to learn about the intermediate and near vision in patiënts who underwent cataract surgery with a specific technique, called "bag in the lens". The main question it aims to answer is whether patiens who underwent this type of cataract surgery have better intermediate vision without spectacle correction than patients who underwent the classic lens in the bag cataract surgery. Participants will: - Have to read with and without spectacle correction at different distances (4 meters, 66 centimeters, 40 centimeters) - Have to fill in 2 questionnaires about visual functioning and spectacle independance Researchers will compare these values to the same values from the standard population who underwent the classic lens in the bag cataract surgery with a monofocal intraocular lens .
Assessment of cataract development in patients with regular caffeine consumption and those without caffeine consumption after pars plana vitrectomy.
This study investigates whether television viewing or music listening can reduce pre-operative anxiety and improve surgical outcomes for patients undergoing cataract surgery. It aims to determine the effectiveness of these interventions compared to a control group and assess their impact on physiological markers of anxiety as well as the incidence of intra-operative hypertensive events. The key questions that are to be answered are: 1. Does watching television before cataract surgery decrease intraoperative hypertensive events and/or pre-operative anxiety in patients? 2. Does listening to music before cataract surgery decrease intraoperative hypertensive events and/or pre-operative anxiety in patients?
The Web-based Barret True K formula with no history formula has been proven to be a good choice for cataract patients after RK in several studies. The American society of cataract and refractive surgeons provides several IOL formulas for cataract patients who have undergone previous corneal refractive surgery. In cases where only IOL-Master data are available, Holladay 1 (Double-K) [Holladay 1 (D-K)] can be used for IOL power calculation in cataract patients with a history of RK. The traditional Haigis formula has also been shown to be effective for cataract patients after RK. To compare the accuracy of four intraocular lens (IOL) power calculation formulas in cataract patients after RK. They are Barrett True-K formula, Holladay 1(D-K) formula, Haigis formula, and MM formula.
Assessment and differences in the centration, tilt and wobble of two secondary IOLs without capsular support.
Comparison of the clinical performance of two enhanced monofocal IOLs with similar design.